Imagine that you are sitting in a park and suddenly remember that you need to send an urgent email. You have your laptop computer with you and you connect it to a wireless access point and access the Internet. Then you send your email. This wouldn't have been possible if there were no wireless Internet for laptops. Wireless Internet has come into our life in so many ways that we don't even realize what a necessary part it has become of our day-to-day lives. How do we connect to a wireless Internet service for laptop computers? There are two ways to do this. They are Wi-Fi connection and Bluetooth connection. Wireless networking is very easy. You just switch on the Wi-Fi button that has been provided in the laptop for Wi-Fi scanning. Once that is done, the computer will connect to the Internet. An interesting fact about Wi-Fi networking is that you can create a network between similar wireless equipment. Consider a situation where you and your friend both have Wi-Fi laptops, and there is some data you want to exchange. Traditional networking architecture demands that you have a wireless router  . But the beauty of Wi-Fi networking technology is that you can set up a network between you and your friend's laptop, and share all the data you want. Broadband   Internet connection is typically preferred by any user as it provides better speed for Internet surfing. Up until the invention of 3G mobile phones, Internet speed on mobile phones was very slow. 3G has the promise of changing the entire face of broadband technology. Just imagine browsing at speeds of more that 2MB per second. To give you a measure of the speed, 3G enables you to watch high quality live videos on the Internet. It is amazing to see how technology changes and the rate at which it changes. There may come a time when you may be able to browse using mobile wireless Internet for laptops anywhere in the world. People can enjoy a wireless Internet service for laptop computers by  _ A) connecting to another computer B) switching off the Wi-Fi button C) using bluetooth connection D) connecting bluetooth to Wi-Fi
C

As most people know, in the past few years, sandstorms have swept across many cities and areas of North China, polluting the air and disturbing daily lives of human beings. People look dirty and suffer many kinds of illnesses, such as breath difficulty. The sandstorm is such a serious problem that it has not only _ the industrial and agricultural development of our country but also caused a lot of trouble to the living conditions of the Chinese people. It is expected that effective  measures should be taken as soon as possible through our joint efforts to limit its occurrence. So what should we do with the frightening sandstorms? Some experts put forward practical suggestions as follows: For one thing, more funs ought to be put into tree planting and forest protection so as to keep more water resources within the surface of the earth. For another, governments of all countries should make laws on environmental protection.For example, banning the use of throw-away chopsticks and punishing illegal tree cutting. Scientists should also study and find ways to cut down the degree of its destruction and to improve the whole environment. How people look forward to sunny days with little breeze touching their faces now and forever! Nevertheless, I am fully confident that the golden days can come back so long as everyone tried his best to protect natural environment from today on. How many ways do some experts put forward to fight against sandstorm? A) 5 B) 4 C) 3 D) 2
C

Traveling by bicycle is a very popular means of transportation throughout China. China has a huge population, and it is said that there is at least one bicycle for every two people within the country. Of course, many people in China ride bicycles purely for sport or exercise, but it's also a much more commonly accepted means of everyday transportation, as compared to countries such as the United States. If you are living for a long period of time in China, chances are you will want to purchase your own bicycle so that you can use it whenever you want for transportation or just for the enjoyment of riding. Even if you don't use a bicycle for everyday transportation, owning one can be a great way of enjoying some of the trails in the rural areas, just for fun. However, if you are just visiting China, renting a bicycle can be a more convenient choice. It is important to choose the correct bicycle for your use. You'll find that in China, the one-speed style of bicycle is extremely popular. These bicycles are great if you want to ride around in the city to see the sights. They are quite comfortable and easy to ride. You can often rent a bicycle for an entire day for around $15. However, if you wish to ride on some of the rural paths, a mountain bike style would be a better choice. They are great for different kinds of road surfaces, providing for a safer ride. If you are planning to have a desire to tour and still be able to carry packages with you, then a touring bike would be the best choice. These are generally the most expensive to rent, but are extremely handy for carrying packages and even some of your luggage along with you. You would like to own a touring bike probably because   _  . A) you have to ride on the road in the countryside B) you have some packages to carry while traveling C) you want to enjoy the sights in the big cities D) it is suitable for all kinds of road surfaces
B

August was one of the nastiest months I can remember: torrential rain; a hailstorm or two; cold, bitter winds; and mists. But we are accustomed to such weather in England. Lord Byron used to say that an English summer begins on July 31 and ends on Aug. 1. He called 1816 "the year without a summer." He spent it gazing across Lake Geneva, watching the storms, with 18-year-old Mary Shelley. The lightening flickering across the lake inspired her Frankenstein, the tale of the man-made monster galvanized into life by electricity. This summer's atrocious weather tempted me to tease a Green whom I know. "Well, what about your weather theory now?" (One of the characteristics of Greens is that they know no history.) He replied: "Yes, this weather is unprecedented. England has never had such an August before. It's global warming, of course." That's the Greens' stock response to anything weather-related. Too much sun? "Global warming." Too little sun? "Global warming." Drought? "Global warming." Floods? "Global warming." Freezing cold? "Global warming." I wish the great philosopher Sir Karl Popper were alive to _ the unscientific nature of global warming. He was a student when Albert Einstein's General Theory of Relativity was first published and then successfully tested. Einstein said that for his theory to be valid it would have to pass three tests. "If," Einstein wrote to British scientist Sir Arthur Eddington, "it were proved that this effect does not exist in nature, then the whole theory would have to be abandoned." The idea that human beings have changed and are changing the basic climate system of the Earth through their industrial activities and burning of fossil fuels--the essence of the Greens' theory of global warming--has not much basis in science. Global warming, like Marxism, is a political theory of actions, demanding compliance with its rules. Those who buy in to global warming wish to drastically curb human economic and industrial activities, regardless of the consequences for people, especially the... Sir Arthur Eddington could be inferred as a   _  . A) politician B) poet C) Greenpeacer D) physicist

D